I have recently read a paper called "Engineering of Gravity and Time" for an undergraduate student. It contains a theory of gravity and time depending on rotation. Well.., I think it looks quiet percussive. However, fairly, it contains some worthwhile ideas, especially it answers some elementary questions that current theories can not such as "why is gravity much weaker than other forces?". It recommends an experiment at the end too. So.., I wish you read it and tell me what you think, please. Available at << Link removed.>> Thanks.